Hi,
What was Nathan senior's occupation on the marriage certificate?
This is a possible:-
Living at Fownley Common, Culcheth
Nathan Silcock 20 silk weaver
Alice Silcock 20 silk weaver
David Silcock 2
All born in county
Class: HO107; Piece 524; Book: 5; Civil Parish: Winwick; County: Lancashire; Enumeration District: 13; Folio: 32; Page: 18; Line: 13; GSU roll: 306910.
www.familysearch.org has a marriage for Nathan Silcock (father Thomas Silcock and Alice Parker 4 Aug 1839 in Winwick

and here is the record from
www.lan-opc.org.ukMarriage: 4 Aug 1839 St Oswald, Winwick, Lancashire, England
Nathan Silcock - (X), Minor Weaver Bachelor of Culcheth
Alice Parker - (X), Minor Spinster of Culcheth
Groom's Father: Thomas Silcock, (Deceased)
Bride's Father: John Parker, Labourer
Witness: William Hill, (X); Thomas Warburton
Married by Banns by: Thomas J Whittington Curate
Register: Marriages 1837 - 1843, Page 88, Entry 175
Source: FHL Film 1885709
Need a little bit more information to make sure this is the family you are looking for though.

Luzzu